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| 1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // Features shared by parsing and pre-parsing scanners. | 5 // Features shared by parsing and pre-parsing scanners. |
| 6 | 6 |
| 7 #ifndef V8_SCANNER_H_ | 7 #ifndef V8_SCANNER_H_ |
| 8 #define V8_SCANNER_H_ | 8 #define V8_SCANNER_H_ |
| 9 | 9 |
| 10 #include "src/allocation.h" | 10 #include "src/allocation.h" |
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| 477 } | 477 } |
| 478 | 478 |
| 479 // Scans the input as a regular expression pattern, previous | 479 // Scans the input as a regular expression pattern, previous |
| 480 // character(s) must be /(=). Returns true if a pattern is scanned. | 480 // character(s) must be /(=). Returns true if a pattern is scanned. |
| 481 bool ScanRegExpPattern(bool seen_equal); | 481 bool ScanRegExpPattern(bool seen_equal); |
| 482 // Returns true if regexp flags are scanned (always since flags can | 482 // Returns true if regexp flags are scanned (always since flags can |
| 483 // be empty). | 483 // be empty). |
| 484 bool ScanRegExpFlags(); | 484 bool ScanRegExpFlags(); |
| 485 | 485 |
| 486 // Scans the input as a template literal | 486 // Scans the input as a template literal |
| 487 Token::Value ScanTemplateSpan(); | 487 Token::Value ScanTemplateStart(); |
| 488 Token::Value ScanTemplateContinuation(); |
| 488 | 489 |
| 489 const LiteralBuffer* source_url() const { return &source_url_; } | 490 const LiteralBuffer* source_url() const { return &source_url_; } |
| 490 const LiteralBuffer* source_mapping_url() const { | 491 const LiteralBuffer* source_mapping_url() const { |
| 491 return &source_mapping_url_; | 492 return &source_mapping_url_; |
| 492 } | 493 } |
| 493 | 494 |
| 494 bool IdentifierIsFutureStrictReserved(const AstRawString* string) const; | 495 bool IdentifierIsFutureStrictReserved(const AstRawString* string) const; |
| 495 | 496 |
| 496 private: | 497 private: |
| 497 // The current and look-ahead token. | 498 // The current and look-ahead token. |
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| 685 // Scans an escape-sequence which is part of a string and adds the | 686 // Scans an escape-sequence which is part of a string and adds the |
| 686 // decoded character to the current literal. Returns true if a pattern | 687 // decoded character to the current literal. Returns true if a pattern |
| 687 // is scanned. | 688 // is scanned. |
| 688 bool ScanEscape(); | 689 bool ScanEscape(); |
| 689 // Decodes a Unicode escape-sequence which is part of an identifier. | 690 // Decodes a Unicode escape-sequence which is part of an identifier. |
| 690 // If the escape sequence cannot be decoded the result is kBadChar. | 691 // If the escape sequence cannot be decoded the result is kBadChar. |
| 691 uc32 ScanIdentifierUnicodeEscape(); | 692 uc32 ScanIdentifierUnicodeEscape(); |
| 692 // Helper for the above functions. | 693 // Helper for the above functions. |
| 693 uc32 ScanUnicodeEscape(); | 694 uc32 ScanUnicodeEscape(); |
| 694 | 695 |
| 696 Token::Value ScanTemplateSpan(); |
| 697 |
| 695 // Return the current source position. | 698 // Return the current source position. |
| 696 int source_pos() { | 699 int source_pos() { |
| 697 return source_->pos() - kCharacterLookaheadBufferSize; | 700 return source_->pos() - kCharacterLookaheadBufferSize; |
| 698 } | 701 } |
| 699 | 702 |
| 700 UnicodeCache* unicode_cache_; | 703 UnicodeCache* unicode_cache_; |
| 701 | 704 |
| 702 // Buffers collecting literal strings, numbers, etc. | 705 // Buffers collecting literal strings, numbers, etc. |
| 703 LiteralBuffer literal_buffer1_; | 706 LiteralBuffer literal_buffer1_; |
| 704 LiteralBuffer literal_buffer2_; | 707 LiteralBuffer literal_buffer2_; |
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| 744 bool harmony_classes_; | 747 bool harmony_classes_; |
| 745 // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL | 748 // Whether we scan TEMPLATE_SPAN and TEMPLATE_TAIL |
| 746 bool harmony_templates_; | 749 bool harmony_templates_; |
| 747 // Whether we allow \u{xxxxx}. | 750 // Whether we allow \u{xxxxx}. |
| 748 bool harmony_unicode_; | 751 bool harmony_unicode_; |
| 749 }; | 752 }; |
| 750 | 753 |
| 751 } } // namespace v8::internal | 754 } } // namespace v8::internal |
| 752 | 755 |
| 753 #endif // V8_SCANNER_H_ | 756 #endif // V8_SCANNER_H_ |
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